PoS - Proceedings of Science
Volume 314 - The European Physical Society Conference on High Energy Physics (EPS-HEP2017) - Top and Electroweak Physics (Parallel Session). Conveners: Jan Kretzschmar; Alexander Mitov; Luca Perrozzi. Scientific Secretary: Patrizia Azzi.
Electroweak precision measurements with the CMS detector
A. Bodek*  on behalf of the CMS Collaboration
Full text: pdf
Pre-published on: November 13, 2017
Published on: March 20, 2018
Abstract
We report on a precision measurement of the effective weak mixing angle using the forward- backward asymmetry of Drell-Yan (ee and μμ) events in pp collisions at s = 8 TeV at CMS. The data sample corresponds to an integrated luminosity of 18.8 fb−1 and 19.6 fb−1 for muon and electron channels, respectively. The sample consists of 8.2 million dimuon and 4.9 million dielectron events. With new analysis techniques and large samples the statistical and systematic uncertainties are reduced by a factor of two compared to previous measurements at the LHC. The extracted value of the effective weak mixing angle from the combined ee and μμ data samples is sin2θlept = 0.23101±0.00036(stat)±0.00018(syst)±0.00016(theory)±0.00030(pdf) or eff sin2θlept = 0.23101±0.00052.
DOI: https://doi.org/10.22323/1.314.0429
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